Yarn-changing device for knitting-machines.



UH. SWINGLEHURST.

YARN CHANGING DEVICE FOR KNITTING MACHINES.

APPLICATION FILED JULY 29. 1910.

1,148,262. Patented July 27, 1915.

2 SHEETS-SHEET I.

25 M 7 x l I 7 v 5a In I INVENTOR WITNESSES HARRY SWINGLEHURST v BY HIS ATTORNEY H. SWINGLEHURST.

YARN CHANGING DEVICE FOR KNITTING MACHINES.

APPLICATION man JULY 29.1910.

Patented July 2-7, 1915 2 SHEETS-SHEET 2.

WITNE SSES [I z 1 NVEN Ton V HARRY SWINGLEHURST W B5 I BY Hi5 ATTORNEY YARN -CHAN GIN G DEVICE FOR KN ITTIN G-MACHIN ES. I

Application filed July 29, 1910.

To all whom it may concern:

Be it known that I, HARRY Swmonnnonsr, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Yarn-Changing Devices for Knitting-Machines, of which the following is a specification.

The objects of my invention are to insure the positive removal of one yarn and the equally positive insertion of the yarn which is to be substituted therefor, to provide for making the change quickly so that the number of needles to which the two yarns are both fed will be reduced to a minimum, to

- insure the clean severing of yarn which is removed, a firm retention of the severed end of the yarn and a positive engagement of the same with theneedles when it'is again introduced, and to prevent entanglement of the yarns on their way to the guides.

These objects I attain in the manner herein-i'zfter set forth, reference being had to the accompanying drawings, in which Figure l is a front view of the yarn I changing device constructed in accordance with my invention; Fig. 2 is a side elevation of the same looking in the direction of the row 02 F 1, and showing some of the ts of the machine in transverse section; Eggs. 3 and 4 are views similar to Figs. 1 and 2-but omitting the thread separating to; Fig. is a plan or top view of the mechanism shown in Figs. 3 and 4; Fig. 6 is a view similar to Fig. 3, but showing the parts in a position different from that in which they are there illustrated; Fig. 7 is view similar to Fig. 4 but showing the parts in the position which they have assumed'in Fig. 6; Fig. 8 is a sectional plan view on the line cz-a, Fig.3, and Fig. 9 is a view illustrating a modification of part of the device.

In the drawings, 1 represents part of the dial cam plate of a knitting machine and 2 ring fixedly mounted on the outer portion of the same. A ring 4 is mounted on the plate Li so as to be capable of a limited amount of d-fro movement thereon, and a ring onnted upon the ring 2 so as to be sus- 'bl of a like motion; The yarn changsevering and retaining, devices depend heir proper operation upon the moveof these two rings 3 and 4 to which i necessary motions can be imparted at the Specification of Letters Patent.

Patented July 27, 19 15. se iainasv'aslo.

desiredtimes by mechanism under control of a pattern chain in the usual manner, which mechanism forms no part of the present invention and need not therefore be described or illustrated.

Fixedly mounted on the ring 2 is a block 6 having its front portion recessed for the reception of vertically guided slides 7 and 9, said front portion of the block being provided at each side with a bracket 11 carrying a set screw 12, the purpose of which will be hereinafter set forth. The slides 7 and 9 are retained in the grooves of the block 6 by means of cross constantly applied to each of the slides by means of-a coiled spring 14 contained in a vertical recess in the front portion of the block 6 and acting upon a bent pin 15, or other suitable bearing for the spring, projecting from the back of each of the slides 7 and 9. (See Figs. 3, 4: and

Depression of the slides 7 and 9 is effected by means of a wedgelG secured to the front end of an arm 17 which projects from a hub 19 pivotally mounted upon a vertical post 20 projecting upwardly from the block 6.

rojecting from the hub 19 in a reverse direction from the arm 17 is another arm 21, which is slotted for thereceptiori of a pin 22 projecting upward from the ring 4, as shown in Figs. 4 and 5.

When the parts are in the position shown in Figs. 3, 4, and 5, the Wedge 16 depresses the slide 9 and permits the slide 7 to be raised by the action of its spring 11 and, when the ring 4 is moved in the direction of the arrow 20 in Fig. 5, the wedge 16 will act to depress the slide 7 and will permit the slide 9 to be raised by the action of its spring, as shown in Fig. 6.

At the lower end of each of the slides 7 and Qis'a'gnide-eye m for one of the knitting yarns and when a slide is depressed the yarn from this guide-eye so will coi'ne'within range of t hooks of the needles and will be caught and knitted thereby, and when the slide is raised this guide-eye will direct the yarn above the hooks of the needles and said yarn will, therefore not be knitted, consequently the knitting can be effected by either of the yarns, depending upon. the adjustment or" the slides, hence if one of the yarns is a heavy yarn and the other a light yarn,

either heavy or light fabric can be produced, as desired. \Vhen either of the slides is raised, however, so as to withdraw its yarn from range of the needle hooks, that yarn should be severed and the severed. end retained until the slide is again lowered in order to bring its yarn into range of the ing of the shear blades 2 needles. For this purpose I provide the front portion of the blo (3. at one side f the same, with a fixed shear blade 23, a pivotally mount at 24, upon the corresponding' side of the block 6, a lever 25, which c ries a shear blade 36, the blades co" to sever any yarn which may be u: tween them,- while their cutting are separated from one another. The lever also carries a resilient plate 27 overlapping the blades 23 and 26 and bent at i'igl t an 'les, so as to lie alongside the inner face oi the ilade 23, shown in 8, whereby a ya extending from the guide-eye of an elevated slide and which has been severed by the clos- V and 26 will be caught and held between the blade and the plate 27, as shown in Fig. 8, until the corresponding slide is again lowered and. the shear blades are opened for the reception of the yarn from the other slide which has meantime been raised. The lever 2 is slotted for the reception of a pin. projecting from the side of a bar 30 which guided in a recess in one side of the block 6 and is prevented from escaping from saio. recess by means of a retainer plate 31, shown in Figs. l and The bar 30 is pro vided with a downwardly projecting pin which enters a ram slot 3?,- in a plate 34 secured to the upper face of the ring 3, the cam slot being so formed that movement of the ring 3 in either direction will cause first an outward and then an inward movement of the bar 30 and consequently an outward, followed by an inward, swing of the lever 25, so as to permit of the separation of the shear blade 26 and clamp plate 27 from the shear blade 93 and thus release the yarn previously held thereby, and permit of the introduction of the other yarn which is severed, and its severed end retained, when the lever 25 swings inwardly again. i

As but a slight movement of the rings 3 and 4: is necessary to effect the desired reversal in the position of the slides 7 and 9 and the operation of the shear blades, the yarns can be very quickly changed and the number of needles which receive both yarns can be reduced to a. minimum, although it: it is desired to provide for the'teeding firs of single yarn and then or" double yarn to the needles, as in splicing, this can readily be eltected by arresting, the movement of the rings 3 and a when such movement is but the open position.

lateness To prevent cnt: their u whie i carries the yuirn'ehanging mechanism,

and having means for directly engagi. lever. 1

In yarn changing mecaanis'sn for ting machines, th combination of guides disposed side by side, means for mow ing the same to operative or inoperative relation with the needles, and a separator plate occupying a position between the yarns as they pass to the yarn guides, said separator plate having on each side otthe same a guide-eye for the yarn passing alongside of the plate.

- In testimony whereof, I have signed my name to this specification, in the presence of two subscribing Witnesses.

HARRY S'WING-LEHURST.

W'itnesses:

JAMES H. Bonn,

STnLLA V. BRADLEY. 

